Asbestos in Adhesives: Identifying Risks and Safe Handling Practices

Why Asbestos Was in Adhesives

Asbestos was widely used in adhesives, especially from the early 20th century to the late 1970s. The popularity of asbestos in products like adhesives can be traced to several practical reasons related to performance and cost.

Key Advantages of Asbestos in Adhesives:

• Fire resistance – Asbestos fibers helped adhesives resist fire and withstand high temperatures.
• Strength and durability – Adding asbestos improved the adhesive’s tensile strength and longevity.
• Chemical stability – Asbestos contributed chemical resistance, making products last longer in harsh conditions.

Adhesives containing asbestos can be found in many building and construction materials today. These products include floor tile mastics, roofing adhesives, and panel bonding agents.

Manufacturers preferred asbestos because it was inexpensive and readily available. It blends easily with other ingredients in both paste and liquid adhesives.

Not all adhesive products contained asbestos, but for decades it was a standard additive. This was especially true in large construction projects where safety and durability were priorities.

Types of Adhesives Containing Asbestos

Asbestos was commonly added to several types of construction adhesives to improve strength, heat resistance and durability. Products like mastics, floor tile adhesives and roofing materials often relied on asbestos due to these properties.

Floor Tile Adhesive (Cutback Mastic)

Cutback mastic is a type of black adhesive traditionally used to install floor tiles, especially asphalt and vinyl floor tiles. From the 1920s-1980s, manufacturers frequently mixed chrysotile asbestos into cutback mastic, often at concentrations ranging from 2%-25%.

The asbestos can make the adhesive strong, flexible, and resistant to moisture and heat. These adhesives were used beneath vinyl sheet flooring, linoleum and asphalt floor tiles in schools, offices and homes.

Old, dry or crumbling mastic can release asbestos fibers when disturbed. Removal or renovation that involves scraping, sanding or demolishing these materials carries a dust hazard, so professional abatement is required when dealing with suspected asbestos-containing cutback mastic.

Key properties of asbestos cutback mastic:

• Black or dark brown color
• Tar-like texture when fresh, hardens over time
• Often found under 9″x9″ and 12″x12″ tiles

Wall Panel and Drywall Adhesives

Adhesives containing asbestos were also used for attaching wall panels, drywall and ceiling tiles. These products help bind materials like gypsum board, decorative wall panels and ceiling panels securely to wood or masonry substrates.

Manufacturers added asbestos to these adhesives to increase fire resistance and reduce the risk of cracks from expansion or impact. The asbestos content tends to be lower than in other construction adhesives, but even small amounts pose a risk if disturbed.

Wall tile mastic and drywall joint adhesives made before the 1980s may contain chrysotile asbestos. They were applied as thick pastes or in caulk-like form, typically hidden by paint or wallpaper and in seams or joints between panels.

When removing or refurbishing older wall panels or ceiling tiles, special care is necessary if original adhesives are present. Unprotected sanding, drilling, or scraping may cause exposure to airborne fibers.

Construction Mastics and Roofing Adhesives

Roofing adhesives, mastics and coatings used in roofing applications also may contain asbestos. These products were used for bonding roofing felt, sealing seams of roofing shingles, and attaching siding shingles. The asbestos provides excellent resistance to heat, weather and UV exposure, making it valuable for exterior and high-temperature settings.

Asbestos mastics were integral to built-up roofing systems and flashings, as well as in adhesives for sealing flashing around chimneys and vents. These materials are often black or grey, with a thick, tar-like consistency that hardens as it ages.

Common asbestos-containing roofing products:

• Roofing felts and shingle adhesives
• Roof coatings, including hot tar and cold application compounds
• Siding mastic for shingles

Disturbance of these roof-related adhesives during maintenance or demolition can create harmful dust. Many roofing systems installed before the 1980s may contain asbestos adhesives, so testing and professional removal are recommended. The continued presence of old asbestos installed decades ago is called legacy asbestos.

Who Was at Risk of Exposure From Asbestos Adhesives

Asbestos adhesives were widely used in residential, commercial and industrial construction from the early 20th century through the 1980s. Asbestos exposure for construction workers and others involved in construction was common. Multiple types of workers in construction crews were exposed, often unknowingly, to airborne asbestos fibers during application, removal or renovation of materials containing these adhesives.

Flooring Installers and General Contractors

Flooring installers and general contractors are among the most at-risk professionals. Vinyl tile, linoleum and carpet adhesives – common on job sites decades ago – often contained chrysotile asbestos fibers for added strength and heat resistance.

Cutting, sanding, or removing flooring materials during installation released asbestos dust into the air. Tasks such as scraping old adhesive residues or drilling through subfloors increased exposure risk, particularly before widespread adoption of respirators and local exhaust ventilation in the 1980s.

General contractors encountered asbestos adhesives when working with roofing felt, wall panels, sheet flooring or cement pipe connections. Those responsible for preparing or cleaning job sites often handled broken, cured adhesives, increasing the possibility of inhaling or ingesting asbestos. Industry documentation from the era shows few workers received training on safe handling techniques.

Contractors may find asbestos today in old adhesives.

Demolition Crews and Renovators

Demolition crews and renovation workers face elevated risk due to the disturbance of aged adhesives during building teardown or remodeling. Removing old tiles, concrete slabs or cement pipe joints could release asbestos fibers trapped for decades.

Even minimal agitation – such as prying up wood blocks bonded with asbestos mastic – generates hazardous dust if proper controls weren’t in place. As older adhesives degrade, they become brittle and friable, making fiber release more likely during physical disturbance or when handled without wetting methods.

Renovators may also unintentionally spread asbestos dust throughout a worksite, endangering other trades or building occupants. Regulations for identifying and safely removing asbestos-containing adhesives were not consistently enforced before the late 1980s.

DIY Homeowners Remodeling Older Homes

Homeowners tackling remodeling projects in properties built before the 1980s often encounter asbestos adhesives when replacing floors, paneling or cement pipes. Without specialized knowledge, many people use simple hand tools to scrape or cut through old glue, producing fine dust contaminated with asbestos.

DIY projects rarely involve protective equipment, containment or professional abatement procedures. As a result, the risk of asbestos exposure is high for individuals and family members, particularly when asbestos-containing flooring or cement pipe insulation is disturbed.

Lists of common asbestos-containing adhesives included:

• Black mastic for floor tiles
• Cut-back adhesives beneath vinyl or linoleum
• Joint compounds and certain cement pipe sealants

Health Risks Associated With Asbestos in Adhesives

Asbestos in adhesives can release dangerous fibers when disturbed, especially during renovation or demolition. The fibers, which are sharp, break apart from the main source and float in the air after being disturbed. Cleaning or other work tasks can send the fibers into the air.

Health issues include cancer, such as mesothelioma, and a lung scarring disease called asbestosis. Exposure increases the risk of specific respiratory diseases with serious long-term health effects.

Inhalation of Airborne Fibers During Removal or Damage

When adhesives containing asbestos are cut, scraped, sanded, or otherwise disturbed, microscopic asbestos fibers can become airborne. These fibers are not visible to the naked eye and can remain suspended in the air for hours.

Inhalation is the primary method of exposure. Workers and occupants in affected areas face the highest risk, especially if proper safety precautions are not followed. Standard dust masks do not provide sufficient protection from asbestos fibers.

Important risk factors include:

• Lack of ventilation
• Manual scraping or grinding
• Use of power tools without HEPA filtration

Even small amounts of airborne asbestos fibers can be hazardous. Once inhaled or swallowed, the fibers may lodge in lung tissue and remain in the body for years.

Long-Term Effects: Mesothelioma, Asbestosis and Lung Cancer

Prolonged or repeated inhalation of asbestos fibers from adhesives can cause severe health problems.

• Mesothelioma is a rare but aggressive cancer of the lining of the lungs or abdomen, almost exclusively linked to asbestos exposure.
• Asbestosis is chronic lung scarring caused by the body’s reaction to trapped fibers, leading to shortness of breath and reduced lung function.
• Lung cancer risk increases significantly with asbestos exposure, particularly in smokers.

There is often a long latency period – sometimes 20-50 years – between asbestos exposure and the appearance of symptoms. Diagnosis is challenging and commonly occurs at advanced stages, especially for mesothelioma. Early identification and medical monitoring are crucial for those known to be exposed.

How to Identify and Manage Asbestos Adhesive Risks

Adhesive products in buildings, especially those from before the late 1980s, may contain asbestos. Managing these materials requires careful identification, testing and safe handling procedures to prevent exposure.

Visual Signs of Asbestos-Containing Mastic

Asbestos mastics often have specific visual characteristics, though confirmation requires testing. Common signs include:

• Color – Older adhesives may appear black, dark brown, gray or yellowish.
• Location – These adhesives are frequently found under floor tiles, linoleum, or around ductwork and pipes.
• Texture – The material may be tar-like, thick, or hardened and brittle over time.
• Age of building – Structures built or renovated before approximately 1985 are at higher risk for asbestos-containing materials.

Although these signs can help narrow down possible danger, they do not guarantee the presence or absence of asbestos.

Testing Adhesive Samples Before Renovation

Before disturbing any suspect material, laboratory testing is the only reliable way to determine asbestos content. Professional asbestos inspectors use specialized tools and collect small samples using personal protective equipment (PPE).

Testing steps:

Never attempt to collect samples without proper training and safety equipment, as improper handling increases health risks. Testing should be performed before beginning any renovation or demolition in areas with potential asbestos-containing adhesives.

Safe Removal and Encapsulation Practices

If asbestos is confirmed, professional abatement is necessary. The two main management methods are removal and encapsulation.

• Removal – Licensed professionals use negative pressure enclosures, HEPA filtration, and thorough cleaning. All contaminated materials are disposed of according to local and federal regulations.
• Encapsulation – Sometimes, it’s safer to seal the adhesive with an approved encapsulant, leaving it undisturbed under new flooring or coverings.

Occupants should not be present during removal or encapsulation, and post-work air clearance testing is required before re-entry. Only trained asbestos abatement contractors should perform these procedures, following regulatory standards for asbestos-containing materials.

Legal Options for Victims of Asbestos Adhesive Exposure

Workers and consumers exposed to asbestos in adhesives may have legal avenues to seek compensation for mesothelioma or another disease. These options depend on how the exposure happened, who is responsible, and the health conditions caused by the exposure.

Occupational Asbestos Exposure Claims for Tradespeople

Tradespeople – including floor installers, construction workers, and carpenters – were frequently exposed to asbestos adhesives, especially before the 1980s. Occupational claims usually rely on proving that the exposure occurred at work, the employer or manufacturer (or both) knew asbestos was in the adhesives and unsafe, and appropriate safety measures weren’t provided.

To file a successful claim, it is important to document the specific adhesives used, the period of employment, and any diagnosis related to asbestos exposure (like asbestosis or mesothelioma). Claimants should also gather employment records and witness statements if available.

Typical compensation may include medical expenses, lost wages, disability benefits, and sometimes pain and suffering. The compensation amount can exceed $1 million depending on the merits of the case and severity of the disease.

Many workers’ compensation programs cover asbestos-related diseases, but deadlines for filing can vary by state.

Manufacturer Liability for Unsafe Adhesive Products

Manufacturers of asbestos-containing adhesives can be held responsible if they failed to warn users about the dangers or produced unsafe products. Product liability lawsuits commonly argue one or more of the following:

• Failure to warn about asbestos hazards
• Defective product design
• Negligence in testing or labeling

Successful cases often require demonstrating that the adhesive caused the illness and the manufacturer knew, or should have known, about the risks. Evidence may include product labels, internal company documents and expert testimony.

Victims can seek compensation for medical costs, lost income, and suffering. Courts may also order punitive damages – which are damages explicitly to punish the company – if the manufacturer’s conduct was especially reckless. Many companies have set up trust funds to pay victims and avoid facing asbestos lawsuits and larger verdicts.

Filing a Mesothelioma Lawsuit or Asbestos Trust Fund Claim

People diagnosed with mesothelioma or other asbestos-related diseases after adhesive exposure can pursue specific legal actions. Lawsuits and asbestos trust fund claims may be filed against employers or manufacturers.

Asbestos trust funds are bank accounts set up by bankrupt companies to pay the victims of asbestos exposure. These bank accounts are pre-filled with money to easily pay victims and settle claims. They are only allowed for companies that have filed for bankruptcy, which is a tactic for manufacturers and employers to avoid multi-million-dollar lawsuit settlements or verdicts.

The process of filing a lawsuit or trust fund claim for compensation usually starts with gathering medical records, proof of exposure and legal advice from an attorney experienced in asbestos litigation. Claims may lead to:

• Settlement – A negotiated payment before the case goes to trial
• Jury verdict – Compensation awarded by a jury after trial
• Trust fund payment – Claims made directly to a fund set up by bankrupt companies

Verdicts can lead to the largest payments but have the largest variance since juries can rule in favor of the defendant. Trust fund payments are the lowest amounts but lead to the quickest compensation and resolution for victims.

Time limits for filing (statutes of limitations) depend on state law and the date of diagnosis. Legal assistance is often necessary due to the complex nature of asbestos claims.

Final Thoughts: Hidden Hazards Beneath the Surface

Asbestos in adhesives often remains unseen, making it difficult for people to detect risks during renovation or demolition. Many buildings constructed before the 1980s may have adhesives containing asbestos, especially in flooring or tile installations.

Potential exposure risks include:

• Removing old tiles or flooring
• Sanding, cutting, or drilling into adhesive layers
• Deterioration or damage to materials over time

Testing is a critical step whenever adhesive-related work is planned in older structures. A certified professional should collect samples to determine whether asbestos is present.

Workers or property owners must use proper protective equipment and follow regulations if asbestos is confirmed. Neglecting these steps may lead to hazardous fiber release, increasing health risks.

Remaining informed and approaching old adhesives with caution helps reduce potential harm. Steps such as documentation, professional assessment, and abiding by safety codes are essential for anyone handling materials from past decades.

Frequently Asked Questions About Asbestos in Adhesives

Asbestos in adhesives poses distinct risks due to its fibrous composition and historical usage in building products. Detecting and managing asbestos in adhesives demands proper methods and awareness of regulatory timelines.

Sources & Author

About the Writer, David Statman

David Statman is a Content Writer for Mesothelioma Guide. He received both his bachelor's and master's in journalism from West Virginia University, and has been in medical publishing since January 2022. He previously worked in sports journalism, primarily reporting on West Virginia sports for a number of publications.

He lives in Delaware with his wife, dog and two cats, and avidly competes as a professional wrestler in the Philadelphia area.